[egypturnash]

The article really neglects to explain what an eruv is and why you would want it. Wikipedia's much more helpful: https://en.wikipedia.org/wiki/Eruv

Basically if you are an observant Jew then you are forbidden from doing work on Saturdays. There are some extremely specific rules about what "work" is. One kind of forbidden work is taking things outside of your house; the eruv symbolically turns most of the city into "home" so you can do things like, say, take your baby for a weekend stroll on a nice day or walk outside with a cane. It's more nuanced than this, there's a whole bunch of rules about what you can't do and about how big an eruv can be and what you have to do to make it valid.

(I am not Jewish so do not ask me for any further details on this.)

[vrosas]

My Jewish friend once told me, specifically discussing this wire, that Jews consider finding loopholes in their own rules a national pastime. The same thing goes for the hotels where someone is paid to wave their hand in front of automatic doors so the guests don't force the door to "work" for them or the elevators that run 24/7, stopping at every floor so they don't have to even work by pressing a button.

[cperciva]

My favourite in this genre comes from a physics DPhil student I knew in Oxford: He insisted that it was permissible for him to work in the lab on Shabbat because after all he was really just studying the works of God and so it was no different in character from reading the Torah.

I'm not sure entirely how serious this argument was, but he wasn't entirely unobservant; he made a point of not playing in orchestra on Friday evenings (after dusk).

[WJW]

Just asked my wife about this, who grew up Jewish and also loves debating these things as she's a programmer. Apparently the rules describe certain activities that one is not allowed to do, which in practice block most people from doing their profession. Reading books is not on that list, but nowhere does it say that the book needs to be the Torah. So it would definitely be allowed to read research papers, as long as you don't take notes (because writing is forbidden). Even a book critic could be reading books during shabat without any issues.

Operating a particle accelerator (ie actually pressing the buttons) would probably be a no-go, but if you set it up beforehand and it runs through the weekend without interaction then that would be fine.

[nobodyandproud]

Starting a particle accelerator would be forbidden, as the electricity alone would be akin to starting a fire.

[WJW]

Yes. But not if you set up a timer to do it automatically. (As long as you set up the timer before shabat obviously)

There is also apparently a slightly more technologically minded sub-sect of Judaism which considers only electricity generators that actually burn things (coal, oil, gas, biomass, etc) to be "fire". Battery powered devices are therefore OK, as would be things purely powered by solar power (as the sun is technically not "on fire") nucear power or even hydroelectric power. For the vast majority of electricity grids though, at least a percentage of generation will be from fueled generators and so forbidden on shabat.

This is not a mainstream view though.

[YZF]

I'm pretty sure 99.999% of observant Jewish people would consider this work but there is a lot of room for interpretation in Judaism and in the end it's between you, your belief, and God. An interesting piece of trivia there is that in Yom Kippur you can atone for sins to god but you can not atone for sins to other people without getting reconciliation.

[graemep]

In general a lot of scientists who are followers of theistic religions do think there is a religious motivation in their work, it that it is the study of God's creation so I would take it seriously.

I would argue that even a non-believer who studies the sciences in pursuit or truth and appreciates the beauty they reveal is doing God's work.

[wbl]

But did he write down anything?

[SlowTao]

I am not the brightest spark as it took me a few months of living in a heavily Jewish area to realise that the pedestrian traffics light were configured to run every cycle so they didn't have to press the button. Probably a lot more details I also missed.

[ticulatedspline]

Could be coincidence. Many of those buttons are "placebo buttons" and aren't actually hooked up, particularly at busy intersections.

[m-s-y]

I doubt very much this is related to any local Jewish population. Most traffic buttons are placebos these days; the pedestrian signals automatically signal alongside the traffic lights.

The exception would be low-pedestrian-volume areas with lights and crossings reserved specifically for pedestrians.

[spyspy]

You're probably correct, but having lived in northern Brooklyn for almost a decade, I wouldn't be surprised if those communities had a hand in that type of infrastructure. They already have their own police force.

[Al-Khwarizmi]

Buttons in pedestrian traffic lights are far from universal, my country is not Jewish and pedestrian lights without a button are very common.

Actually I dislike those with buttons. They send the message that cars passing and pedestrians stopping is the "default", and ensure that a lone pedestrian always has to stop, regardless of luck, while establishing the ritual that pedestrians need to "beg" for being allowed to cross. In my view, cars already have too many privileges in cities, it's not the end of the world if they have to stop at an empty crossing from time to time (something that pedestrians also have to do often).

[msgodel]

Cars have much more inertia and often more traffic than pedestrians, it makes sense to give them right of way and reduce the ambiguity with traffic control devices in most places.

[adrianN]

If you take sidewalks away completely and turn everything into a big highway you’ll have even less pedestrian traffic. That doesn’t make it good policy.

[voidUpdate]

In my area at least, if there is a pedestrian crossing across a single road, it will not be automatic, but if it's near a junction, where the lights would need to toggle anyway, the button does nothing, and it's just on a fixed timer

[kennethrc]

I've been a "Sabbath Goy" a couple of times for some of my friends :)

[bentley]

> Basically if you are an observant Jew then you are forbidden from doing work on Saturdays. There are some extremely specific rules about what "work" is.

This was cause for major debate in the founding days of Christianity. Jesus’ ministry as a Jewish rabbi often involved condemning the religious leaders of the time for focusing on minutiae of the law, particularly Sabbath law.

Matthew 23:1–7 — “Then Jesus spoke to the crowds and to His disciples: ‘The scribes and Pharisees sit in Moses’ seat. So practice and observe everything they tell you. But do not do what they do, for they do not practice what they preach. They tie up heavy, burdensome loads and lay them on men’s shoulders, but they themselves are not willing to lift a finger to move them.’”

Matthew 23:23–24 — “Woe to you, scribes and Pharisees, you hypocrites! You pay tithes of mint, dill, and cumin. But you have disregarded the weightier matters of the law: justice, mercy, and faithfulness. You should have practiced the latter, without neglecting the former. You blind guides! You strain out a gnat but swallow a camel.” [Referring to the pious practice of straining one’s drinks for bugs to avoid violating dietary law.]

Luke 14:1–6 — “One Sabbath, when Jesus went to eat in the house of a prominent Pharisee, he was being carefully watched. There in front of him was a man suffering from abnormal swelling of his body. Jesus asked the Pharisees and experts in the law, ‘Is it lawful to heal on the Sabbath or not?’ But they remained silent. So taking hold of the man, he healed him and sent him on his way.

“Then he asked them, ‘If one of you has a child or an ox that falls into a well on the Sabbath day, will you not immediately pull it out?’ And they had nothing to say.”

Mark 2:23–28 — “One Sabbath Jesus was passing through the grainfields, and His disciples began to pick the heads of grain as they walked along. So the Pharisees said to Him, ‘Look, why are they doing what is unlawful on the Sabbath?’

“Jesus replied, ‘Have you never read what David did when he and his companions were hungry and in need? During the high priesthood of Abiathar, he entered the house of God and ate the consecrated bread, which was lawful only for the priests. And he gave some to his companions as well.’

“Then Jesus declared, ‘The Sabbath was made for man, not man for the Sabbath. Therefore, the Son of Man is Lord even of the Sabbath.’”

Mark 3:1–6 — “Another time Jesus went into the synagogue, and a man with a shriveled hand was there. Some of them were looking for a reason to accuse Jesus, so they watched him closely to see if he would heal him on the Sabbath. Jesus said to the man with the shriveled hand, ‘Stand up in front of everyone.’

“Then Jesus asked them, ‘Which is lawful on the Sabbath: to do good or to do evil, to save life or to kill?’ But they remained silent.

“He looked around at them in anger and, deeply distressed at their stubborn hearts, said to the man, ‘Stretch out your hand.’ He stretched it out, and his hand was completely restored. Then the Pharisees went out and began to plot with the Herodians how they might kill Jesus.”

And there are further examples, like John 5.